Superheater for oil-burners.



Nb. 757,182 PATENTED APR. 12, 1904. 4

J. M. DONAHIUE, .SUPERHEATER FOR OIL BURNERS;

v APPLICATION FILED OUT. 16, 1903.

N0 MODEL. 2 SHJEETS-SHEBT 1.

iiiiiillIlIlHlilIlil PATENTBD APR. 12, 1904.

Y J. "DONAHUE.

SUPERHFATER FOR OIL BURN'BRS.

APPLICATION FILED OUT. 16, 1903" N0 MODEL.

2 SHEETS-SHEET 2.

UNITED STATES PATENT area JAMES M. DONAHUE, or "SAN ROSA, CALlFORNIAQ SUPERHEATER FOR Ol L-BURNERS;

SPECIFICATION forming part of Letters Patent No. 757,182, dated April 12, 1904:.

Application filed October 16, 1903.

To all rah/omit may concern! Be it known that I, J AMEs M. DONAHUE, a citizen of the United States, residing at Santa Rosa, in the county of Sonoma and State of California, have invented new and useful Improvements in Superheaters for Oil-Burners,

'of which the following is a specification,

-- pipe fitted centrally within the steam-pipe and following its course and extending back to the front of the boiler, connection between the oil-pipe and the burner, and a connection between the steam-pipe and the burner.

It also comprises details ofconstruction, which will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a longitudinal central section of boiler-setting, showing my superheater. Fig. 2 is a front elevation of same. Fig. 3 is a plan view. of superheater-pipes Fig. 4 is a longitudinal central section of end of burner. Fig 5 is an end View of same.

A is a boiler of any suitable or desired description.

B represents the steam-drum, into which the steam from the boiler is conducted by connecting-pipesGr in the usual manner.

2 represents a pipe opening out of the steamdrurn leading-down to a point adjacent to the front of the boiler-furnace, and at this point it is connected with a horizontal pipe 3. This horizhntal pipe is of any suitable or desired diameter, extends into the boiler-furnace, and at the rear is connected by suitable elbows or couplings'with a transverse pipe 4. By another elbow or T-coupling this pipe 4 is-connected with a pipe 5, which returns. to the front of the furnace and essentially parallel withthe pipe 3.

The pipe 3 has a plug fitted into its end exterior to the boiler, with a central opening Serial Ito- 177,235. (Ne model.)

into which an oil-conductingpipe 6 passes. This pipe 6 extends centrally throughthe interior of the pipe 3, and bysuitable. elbows and connections it is carried across within the pipe 4 and thence returned through the pipe -5 to .the front, emerging from the front end of the pipe 5 through an opening in the plug or closure at the outer end of this pipe. By

elbows this pipe 6 has its direction changed, as

shown at 7, and it then enters the burner proper, as shown'at 8, this burner extending "anddischarging into the furnace between and ordinarily not be vaporized will beso highly heated in passing through this pipe that it will be vaporized before reaching the burner at 8.

9 shows a connecting-pipe between the outer end of the steam-pipe 5 and the burner so that the superheated steam from this pipe may be admitted into the burner and mingled with the oil to be discharged at the front end.. Air

may also be admitted into the pipe surround-- ing the buirnenpipe, so that a sufficient quantity may be delivered to provide for the best combustion of the fuel.

- As here shown, the discharge end of the burner consists of a cap 10, threaded to screw upon the end of the outer pipe andhaving its central portion formed with a socket or depression with screw-threads of the same pitch with the outer ones, as at 11. This allows the cap to be screwed simultaneously upon both the outer and the inner tubes of the burner or similarly removed. Two narrow slits 12 and 13 are made in this cap, one registering with the inner oilpipe.and the other with the steam-pipe and just below the one first named, so that the steam discharged from the slit 13 intersects and mingles with the oil-vapor from l I "Having thus described my invention, what I claimg and desire to secure by Letters'P-atent, v

, 1. The combination with a furnace, of a pipe- 5-. recei ving steam therefrom, a pipe connected with'the first-named pipe and extending horizpntally'beneath the boiler said second pipe returned substantially upon itself to the front of the boiler, the two members of the said pipe lying in substantially the same horizontal plane, a burner'positioned in a lower horizontal plane than the steam-pipe, and an oil-pipe concentric with and extendingthroughout the steam-pipe and having its returned end connected with the burner.

'2. The combination with a steam-boiler and a steam-drum connected therewith, ofa steampipe leading from the drum, a second pipe into-which the steam-pipe leads said second pipe extending through the front of the furnace and beneath the boiler and thence bent horizontally and returned to the front of the furnace, the parts of said second pipe lying in substantially the same horizontal plane, a burner positioned in a lower horizontal plane than the steam-pipe and leading through the front'of the furnace, an-oil'pipe concentric with and traversing the second-named pipe,

anda pipe connecting the returned end of the 3 oil-pipe with the burner,

3. The combination with a steam-boiier and ancil-burner, of a pipe connected with and receiving steam from the boiler, a return-pipe within the furnaceand having'its members in substantially the same horizontal plane,an

oil-pipe within and traversing the steampipe,

ayertical pipe connecting the-oil-pipe with nect, a flat screw-cap fitting the dischargeend of the outer tube, and having a screw-threaded depression engaging the end of-the inner tube, and discharge-slitsforn1ed in said cap and communicating respectively with thesteam and oil pipes of the burner.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses; v

4 JAMES M. DONAHUE. Witnesses:

J. R. Lnrro, GEO. BURMESTER. 

